Finding the Fourth Proportional to 3,653.78, 5,442.46 and 3,605.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,653.78 : 5,442.46 = 3,605.33 : x
2. Step 2: Convert to fraction form
   3,653.78/5,442.46 = 3,605.33/x
3. Step 3: Cross multiply
   3,653.78x = 5,442.46 × 3,605.33
4. Step 4: Simplify right side
   3,653.78x = 19,621,868.90
5. Step 5: Solve for x
   x = 19,621,868.90/3,653.78
6. Step 6: Final answer
   x = 5,370.30